/* ==========================================================================
   FACEBMI — nav.css
   Hamburger trigger + right-side navigation drawer + overlay.
   Shared across every page so navigation feels identical site-wide.
   ========================================================================== */

/* ---------------------------------------------------------------------- 
   Hamburger button
   ---------------------------------------------------------------------- */
.hamburger-btn {
  position: relative;
  z-index: 90;
  width: 42px;
  height: 42px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: box-shadow var(--transition-fast), background var(--transition-fast);
}

.hamburger-btn:hover {
  background: rgba(47, 143, 255, 0.08);
  box-shadow: var(--shadow-glow-sm);
}

.hamburger-btn span {
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--color-accent-2);
  box-shadow: 0 0 6px var(--color-accent-glow);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

/* Morph into an "X" while the drawer is open */
.hamburger-btn.is-active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger-btn.is-active span:nth-child(2) {
  opacity: 0;
}
.hamburger-btn.is-active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------------------------------------------------------------------- 
   Overlay behind the drawer
   ---------------------------------------------------------------------- */
.nav-overlay {
  position: fixed;
  inset: 0;
  z-index: 70;
  background: rgba(4, 7, 15, 0.7);
  opacity: 0;
  visibility: hidden;
  pointer-events: none; /* FIX: Guarantees closed overlay never blocks page scroll */
  transition: opacity var(--transition-medium), visibility var(--transition-medium);
}

.nav-overlay.is-active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto; /* FIX: Catch clicks to close menu when active */
}

/* ---------------------------------------------------------------------- 
   Right-side navigation drawer
   ---------------------------------------------------------------------- */
.nav-drawer {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 80;
  width: min(320px, 82vw);
  height: 100vh;
  display: flex;
  flex-direction: column;
  padding: 24px 32px 40px;
  background: linear-gradient(165deg, rgba(11, 18, 34, 0.98) 0%, rgba(6, 9, 20, 0.99) 100%);
  border-left: 1px solid var(--color-border);
  box-shadow: -24px 0 60px rgba(0, 0, 0, 0.45), var(--shadow-glow-sm);
  transform: translateX(100%);
  transition: transform var(--transition-medium);
}

.nav-drawer.is-open {
  transform: translateX(0);
}

.nav-drawer-close {
  align-self: flex-end;
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-accent-2);
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}

.nav-drawer-close:hover {
  box-shadow: var(--shadow-glow-sm);
  transform: rotate(90deg);
}

.nav-drawer-close svg {
  width: 16px;
  height: 16px;
}

.nav-drawer-list {
  list-style: none;
  margin: 56px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: 14px 2px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: var(--tracking-wide);
  color: var(--color-text-primary);
  transition: color var(--transition-fast), text-shadow var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 2px;
  bottom: 8px;
  width: 0;
  height: 2px;
  background: var(--color-accent-2);
  box-shadow: 0 0 8px var(--color-accent-glow);
  transition: width var(--transition-medium);
}

.nav-link:hover,
.nav-link.is-current {
  color: var(--color-accent-2);
  text-shadow: 0 0 14px var(--color-accent-glow);
}

.nav-link:hover::after,
.nav-link.is-current::after {
  width: calc(100% - 2px);
}

/* Prevents background scroll ONLY while the drawer is explicitly open */
body.nav-open {
  overflow: hidden !important;
}

/* ---------------------------------------------------------------------- 
   Header actions (Sign Up / Sign Out buttons)
   ---------------------------------------------------------------------- */
.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.btn-signup {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 18px;
  background: #ffffff;
  color: #0A2E5C;
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: transform .25s ease, box-shadow .25s ease, background .25s ease, color .25s ease;
  box-shadow: 0 6px 18px rgba(255, 255, 255, .12);
}

.btn-signup:hover {
  background: #ffffff;
  color: #0A2E5C;
  box-shadow: 
    0 0 10px rgba(255,255,255,.45),
    0 0 20px rgba(255,255,255,.30),
    0 0 40px rgba(255,255,255,.18),
    0 10px 24px rgba(255,255,255,.15);
}

.btn-signup:active {
  transform: translateY(0);
  box-shadow: 0 0 8px rgba(255,255,255,.25);
}

.btn-signup:focus-visible {
  outline: none;
  box-shadow: 
    0 0 0 3px rgba(255,255,255,.35),
    0 0 18px rgba(255,255,255,.30);
}

@media (max-width: 768px) {
  .btn-signup {
    padding: 8px 18px;
    font-size: .9rem;
  }
}

.btn-signout {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 18px;
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255,255,255,.8);
  border-radius: 12px;
  text-decoration: none;
  font-weight: 600;
  transition: .25s ease;
}

.btn-signout:hover {
  background: rgba(255,255,255,.08);
  box-shadow: 0 0 15px rgba(255,255,255,.25);
}